Anybody's Cura just stopped running?

Been running some version of Cura on Win 10 for a good while with no issues. Ran perfectly last Thursday. Tried to start it today and it spins a minute and then nothing. I rebooted and get the same. I uninstalled, rebooted, reinstalled, rebooted and still get the same. That was with version 2.4. I uninstalled and got 2.6 and tried it all again with 2.6.

Looks like it installed fine, I see the spinner for a couple of seconds and nothing.

CTRL-ALT-DELETE never shows cura running.

Multiple versions ran perfectly on the same system for over a year and then it is now completely dead. I haven’t installed anything. I ran virus checkers and found nothing, etc etc.

Any ideas why it would just stop executing or any way to troubleshoot?

Thanks
Jeff